/usr/bin/mkdns323fw is in dns323-firmware-tools 0.3-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | #!/usr/bin/ruby1.8
# Create a firmware file suitable for upload to a DNS-323 or CH3SNAS
# device.
#
# Copyright (C) 2008 Matt Palmer <mpalmer@hezmatt.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# Script based on information provided by Leschinsky Oleg.
#
# To construct a firmware image, you need six things: a uBoot-packaged
# kernel, a uBoot-packaged initrd, the product/custom/model IDs for the
# particular device you want to target, and the firmware signature type.
# Using the wrong values can result in the device rejecting the firmware.
#
# Known values for these the IDs and firmware signature type are:
#
# prod custom model fwtype
# DNS-323 rev B1: 7 1 1 FrodoII
# CH3SNAS: 7 2 1 FrodoII
# DNS-343: 9 1 1 Gandolf
# DNS-321: 10 1 1 Chopper
#
require 'optparse'
def main
opts = parse_cmdline
validate_command_line(opts)
k_size = File.stat(opts[:kernel]).size
i_size = File.stat(opts[:initrd]).size
d_size = opts[:defaults].nil? ? 0 : File.stat(opts[:defaults]).size
ctl_header = [
64,
k_size,
64 + k_size,
i_size,
64 + k_size + i_size,
d_size,
checksum(opts[:kernel]),
checksum(opts[:initrd]),
d_size == 0 ? 0 : checksum(opts[:defaults]),
"\x55\xAA#{opts[:signature]}\x00\x55\xAA",
opts[:prod_id],
opts[:custom_id],
opts[:model_id],
1,
3,
"\x00" * 7,
0
].pack("V9a12c5a7V")
File.open(opts[:output], 'w') do |fd|
fd.write ctl_header
fd.write File.read(opts[:kernel])
fd.write File.read(opts[:initrd])
fd.write File.read(opts[:defaults]) unless d_size == 0
end
puts "Firmware generation completed successfully."
end
def validate_command_line(opts)
%w{kernel initrd}.each do |k|
if !File.exist?(opts[k.to_sym])
$stderr.puts "#{k} file (#{opts[k.to_sym]}) doesn't exist!"
exit 1
end
if !is_uboot(opts[k.to_sym])
$stderr.puts "#{k} file #{opts[k.to_sym]} is not a uboot file"
exit 1
end
end
if opts[:defaults] and !File.exist?(opts[:defaults])
$stderr.puts "default file (#{opts[:defaults]}) doesn't exist!"
exit 1
end
if opts[:signature]
unless %w{FrodoII Chopper Gandolf}.include? opts[:signature]
$stderr.puts "Unknown signature type #{opts[:signature]}"
exit 1
end
else
opts[:signature] = "FrodoII"
end
end
def is_uboot(file)
File.read(file, 4) == "\x27\x05\x19\x56"
end
def checksum(file)
sum = 0
File.read(file).unpack("V*").each { |v| sum ^= v }
sum
end
def parse_cmdline
opts = OptionParser.new
optargs = {}
opts.on('-h', '--help', "Print this help") { optargs[:help] = true }
opts.on('-k KERNEL', '--kernel KERNEL', "Specify the kernel to include in the firmware image", String) { |optargs[:kernel]| }
opts.on('-i INITRD', '--initrd INITRD', "Specify the initrd to include in the firmware image", String) { |optargs[:initrd]| }
opts.on('-d DEFAULTS', '--defaults DEFAULTS', "Specify the defaults.tar.gz to include in the firmware image (optional)", String) { |optargs[:defaults]| }
opts.on('-o OUTPUT', '--output OUTPUT', "Specify where to put the resulting firmware image", String) { |optargs[:output]| }
opts.on('-p PROD_ID', '--product-id PROD_ID', "The product ID to embed in the firmware image", Integer) { |optargs[:prod_id]| }
opts.on('-c CUSTOM_ID', '--custom-id CUSTOM_ID', "The custom ID to embed in the firmware image", Integer) { |optargs[:custom_id]| }
opts.on('-m MODEL_ID', '--model-id MODEL_ID', "The model ID to embed in the firmware image", Integer) { |optargs[:model_id]| }
opts.on('-s SIGNATURE', '--signature SIGNATURE', "The firmware signature type (either FrodoII, Chopper or Gandolf)", String) { |optargs[:signature]| }
opts.parse(ARGV)
if optargs[:help]
$stderr.puts opts.to_s
exit 0
end
%w{kernel initrd output prod_id custom_id model_id}.each do |k|
if optargs[k.to_sym].nil?
$stderr.puts "Missing required argument #{k}"
exit 1
end
end
optargs
end
main
|